/* ==========================================
   minmlTowerDefense - Monochrome Theme
   ========================================== */

/* Local Font */
@font-face {
  font-family: 'Source Code Pro';
  src: url('../font/SourceCodePro-VariableFont_wght.ttf') format('truetype');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #292929;
  --grid-line: #333333;
  --grid-path: #222;
  --text-primary: #ffffff;
  --text-secondary: #666666;
  --accent: #d132bf;
  --accent-dim: #8a2080;
  --accent-dim2: #4a1244;
  --tower-fill: #ffffff;
  --enemy-fill: #ffffff;
  --danger: #ff3344;
  --success: #00ff88;
}

.hidden {
  display: none !important;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Source Code Pro', monospace;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh; /* Support for dynamic viewport height */
  overflow: hidden;
}

#game-container {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  position: relative;
  overflow: hidden;
}

/* ==========================================
   Screens
   ========================================== */

.screen {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  flex-direction: column; /* Ensure all screens use column layout by default */
}

.screen.active {
  display: flex;
}

/* ==========================================
   Menu Screen
   ========================================== */

#menu-screen {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: 
    radial-gradient(ellipse at 50% 50%, rgba(209, 50, 191, 0.08) 0%, transparent 60%),
    var(--bg-primary);
}

.menu-content {
  text-align: center;
}

.game-title {
  font-size: 4rem;
  font-weight: 500;
  letter-spacing: -2px;
  margin-bottom: 0;
}

.accent {
  color: var(--accent);
  font-weight: 200;
  animation: pulse-weight 2.5s ease-in-out infinite alternate;
}

@keyframes pulse-weight {
  0% {
    font-weight: 200;
  }
  33% {
    font-weight: 200;
  }
  66% {
    font-weight: 900;
  }
  100% {
    font-weight: 900;
  }
}

.version-text {
  font-size: 9px;
  color: var(--text-secondary);
  letter-spacing: 1px;
  margin-bottom: 0.9rem;
  display: block;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  letter-spacing: 2px;
  text-transform: lowercase;
  margin-bottom: 3rem;
}

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.menu-btn {
  font-family: 'Source Code Pro', monospace;
  font-size: 1rem;
  font-weight: 600;
  padding: 1rem 3rem;
  min-width: 220px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 1px;
}

.menu-btn:hover {
  background: var(--accent);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.menu-btn.secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--text-secondary);
}

.menu-btn.secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}

/* ==========================================
   Game Screen
   ========================================== */

#game-grid {
  border: 1px solid var(--accent);
}

#game-screen {
  background: var(--bg-primary);
  max-width: 80vh;
  margin: 0 auto;
  left: 50%;
  transform: translateX(-50%);
}

@media (max-width: 1024px) {
    #game-screen {
      max-width: 100%;
      left: 0;
      transform: none;
    }
} 

/* HUD */
#hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--grid-line);
  height: 60px;
}

.hud-left, .hud-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hud-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
}

@media (max-width: 480px) {
  .hud-center {
    position: static;
    transform: none;
    order: 2;
  }
  
  #hud {
    padding: 0.5rem 1rem;
    gap: 0.5rem;
  }
}

.logo {
  font-size: 1.2rem;
  font-weight: 500;
}

.hud-divider {
  color: var(--text-secondary);
}

#wave-display {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

#wave-display span {
  color: var(--text-primary);
}

#hp-display {
  font-size: 1.2rem;
  letter-spacing: 2px;
}

/* Stats Window */
#stats-window {
  position: absolute;
  top: 60px;
  right: 10px;
  background: rgba(10, 10, 10, 0.9);
  border: 1px solid var(--grid-line);
  padding: 8px 12px;
  display: flex;
  gap: 16px;
  font-size: 0.75rem;
  z-index: 100;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.65rem;
  letter-spacing: 1px;
}

.stat-value {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.85rem;
}

.hp-full {
  color: var(--accent);
}

.hp-empty {
  color: var(--text-secondary);
  opacity: 0.3;
}

.bp-label {
  color: var(--text-secondary);
}

#bp-display {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

#bp-display.bp-increase {
  color: var(--text-primary);
  text-shadow: 0 0 10px var(--accent);
  transition: none;
}

/* Grid Container */
#grid-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .8vw;
  position: relative;
  min-height: 0; /* Important for flexbox overflow */
  width: 100%;
}

#game-grid {
  max-width: 100%;
  max-height: 100%;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  background: var(--bg-primary);
  display: block;
  touch-action: none; /* Prevents scrolling while interacting with the grid */
}

/* Tower Panel */
#tower-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--grid-line);
  height: 100px;
}

.tower-buttons {
  display: flex;
  gap: 0.5rem;
}

.tower-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--grid-line);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  min-width: 80px;
  font-family: 'Source Code Pro', monospace;
}

.tower-btn:hover {
  border-color: var(--accent);
  background: rgba(209, 50, 191, 0.1);
}

.tower-btn.selected {
  border-color: var(--accent);
  background: rgba(209, 50, 191, 0.2);
}

.tower-btn.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.tower-icon {
  width: 24px;
  height: 24px;
  background: var(--text-primary);
}

.tower-icon.arrow {
  clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
}

.tower-icon.ice {
  clip-path: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
}

.tower-icon.fire {
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.tower-icon.poison {
  border-radius: 50%;
}

.tower-name {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 1px;
}

.tower-cost {
  font-size: 0.6rem;
  color: var(--accent);
}

.panel-divider {
  width: 1px;
  height: 60px;
  background: var(--grid-line);
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
}

.action-btn {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.75rem 1.5rem;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--grid-line);
  cursor: pointer;
  transition: all 0.35s ease;
  letter-spacing: 1px;
}

.action-btn:hover {
  border-color: var(--text-primary);
  font-weight: 200;
}

.action-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-primary);
}

.action-btn.primary:hover {
  background: var(--accent-dim);
  border-color: var(--accent-dim);
}

.action-btn.primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.action-btn.active {
  background: var(--danger);
  border-color: var(--danger);
}

/* Start Wave Countdown */
.start-wave-container {
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}

.countdown-bar {
  height: 3px;
  background: var(--grid-line);
  width: 100%;
  overflow: hidden;
  border-radius: 2px;
}

.countdown-fill {
  height: 100%;
  background: var(--text-primary);
  width: 100%;
  transition: width 0.1s linear;
}

.countdown-bar.hidden {
  display: none;
}

/* Selected Tower Info */
#selected-tower-info {
  position: absolute;
  top: 60px;
  left: 10px;
  background: rgba(10, 10, 10, 0.95);
  border: 1px solid var(--grid-line);
  padding: 10px 14px;
  min-width: 140px;
  z-index: 100;
}

#selected-tower-info.hidden {
  display: none;
}

.tower-info-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--grid-line);
}

#selected-tower-name {
  font-weight: 600;
  font-size: 0.85rem;
}

#selected-tower-level {
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 500;
}

.tower-info-stats {
  display: flex;
  gap: 12px;
  font-size: 0.75rem;
}

.tower-info-stats .stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.tower-info-stats .label {
  font-size: 0.6rem;
  color: var(--text-secondary);
}

#upgrade-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--grid-line);
  gap: 8px;
}

#upgrade-row.hidden {
  display: none;
}

#upgrade-info {
  font-size: 0.7rem;
  color: var(--success);
}

.upgrade-arrow-btn {
  width: 24px;
  height: 24px;
  background: transparent;
  border: 1px solid var(--success);
  color: var(--success);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  padding: 0;
  line-height: 1;
}

.upgrade-arrow-btn:hover {
  background: var(--success);
  color: var(--bg-primary);
}

.upgrade-arrow-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.upgrade-arrow-btn:disabled:hover {
  background: transparent;
  color: var(--success);
}

#upgrade-progress {
  margin-top: 8px;
}

#upgrade-progress.hidden {
  display: none;
}

.progress-bar {
  height: 4px;
  background: var(--grid-line);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.1s linear;
}

#upgrade-time-remaining {
  display: block;
  margin-top: 4px;
  font-size: 0.65rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Tower Tooltip */
#tower-tooltip {
  position: absolute;
  background: var(--bg-secondary);
  border: 1px solid var(--accent);
  padding: 1rem;
  min-width: 180px;
  z-index: 100;
  pointer-events: none;
}

#tower-tooltip.hidden {
  display: none;
}

.tooltip-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--grid-line);
}

#tooltip-name {
  font-weight: 700;
}

#tooltip-class {
  color: var(--accent);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.tooltip-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.tooltip-stats .stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tooltip-stats .label {
  font-size: 0.6rem;
  color: var(--text-secondary);
}

.tooltip-effect {
  font-size: 0.7rem;
  color: var(--text-secondary);
  font-style: italic;
}

/* ==========================================
   Game Over / Victory Screens
   ========================================== */

#gameover-screen,
#victory-screen {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 10, 0.95);
}

.gameover-content,
.victory-content {
  text-align: center;
}

.gameover-content h2,
.victory-content h2 {
  font-size: 3rem;
  margin-bottom: 2rem;
  letter-spacing: 4px;
}

.victory-title {
  color: var(--accent);
}

.victory-subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.final-stats {
  margin-bottom: 2rem;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  min-width: 300px;
  border-bottom: 1px solid var(--grid-line);
}

.stat-label {
  color: var(--text-secondary);
}

.stat-value {
  font-weight: 700;
}

.stat-value.accent {
  color: var(--accent);
  font-size: 1.2rem;
}

.name-input-container {
  margin-bottom: 2rem;
}

.name-input-container label {
  display: block;
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}

.name-input-container input {
  font-family: 'Source Code Pro', monospace;
  font-size: 1rem;
  padding: 0.75rem 1rem;
  width: 300px;
  background: var(--bg-secondary);
  border: 1px solid var(--grid-line);
  color: var(--text-primary);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.name-input-container input:focus {
  outline: none;
  border-color: var(--accent);
}

.gameover-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
}

/* ==========================================
   Highscores Screen
   ========================================== */

#highscores-screen {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.highscores-content {
  text-align: center;
}

.highscores-content h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  letter-spacing: 4px;
}

.mode-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  justify-content: center;
}

.tab-btn {
  font-family: 'Source Code Pro', monospace;
  font-size: 0.8rem;
  padding: 0.75rem 2rem;
  background: transparent;
  border: 1px solid var(--grid-line);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tab-btn:first-child {
  border-right: none;
}

.tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-primary);
}

.scores-list {
  min-width: 400px;
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 2rem;
}

.score-entry {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--grid-line);
}

.score-entry:first-child {
  background: rgba(209, 50, 191, 0.1);
}

.score-rank {
  color: var(--text-secondary);
  width: 40px;
}

.score-name {
  flex: 1;
  text-align: left;
  padding-left: 1rem;
}

.score-waves {
  color: var(--text-secondary);
  width: 80px;
}

.score-points {
  color: var(--accent);
  font-weight: 700;
  width: 100px;
  text-align: right;
}

.no-scores {
  color: var(--text-secondary);
  padding: 2rem;
}

/* ==========================================
   SVG Game Elements
   ========================================== */

.grid-cell {
  fill: var(--bg-primary);
  stroke: var(--grid-line);
  stroke-width: 0.5;
}

.grid-cell.path {
  fill: var(--grid-path);
}

.grid-cell.entry,
.grid-cell.exit {
  fill: var(--accent);
  opacity: 0.3;
}

/* Tower placement preview */
.tower-preview {
  pointer-events: none;
}

.preview-outline-valid {
  fill: rgba(255, 255, 255, 0.1);
  stroke: none;
}

.preview-outline-invalid {
  fill: rgba(209, 50, 191, 0.15);
  stroke: none;
}

.preview-shape-valid {
  fill: rgba(255, 255, 255, 0.6);
  stroke: var(--text-primary);
  stroke-width: 1;
}

.preview-shape-invalid {
  fill: rgba(209, 50, 191, 0.4);
  stroke: var(--accent);
  stroke-width: 1;
}

.tower-outline {
  fill: var(--accent-dim2);
  stroke: none;
}

.tower-shape {
  fill: none;
  transition: fill 0.15s ease;
  stroke: #fff;
  stroke-width: 2;
}

.tower-shape.selected {
  fill: var(--accent);
}

.tower-shape.shooting {
  stroke-width: 4;
  filter: drop-shadow(0 0 4px var(--accent));
  transition: all 0.05s ease;
}

.tower-shape.upgrading {
  fill: var(--grid-line);
  animation: tower-upgrade-pulse 0.5s ease-in-out infinite alternate;
}

@keyframes tower-upgrade-pulse {
  0% { opacity: 0.4; }
  100% { opacity: 0.8; }
}

/* Upgrade dots (three white dots during upgrade) */
.upgrade-dot {
  fill: var(--text-primary);
  opacity: 0.3;
  animation: upgrade-dot-pulse 0.8s ease-in-out infinite;
}

@keyframes upgrade-dot-pulse {
  0%, 100% { 
    opacity: 0.3;
    r: 1;
  }
  50% { 
    opacity: 1;
    r: 2;
  }
}

.tower-level {
  fill: var(--text-primary);
  font-size: 8px;
  font-weight: 600;
  text-anchor: middle;
  pointer-events: none;
}

.tower-range {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
  stroke-dasharray: 4 4;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.tower-range.visible {
  opacity: 0.5;
}

.crosshair-line {
  stroke: var(--accent);
  opacity: 0.15;
  pointer-events: none;
}

.enemy-shape {
  fill: none;
  stroke: var(--enemy-fill);
  stroke-width: 1;
}

.enemy-shape.shooting {
  stroke-width: 3;
  filter: drop-shadow(0 0 4px var(--danger));
  transition: all 0.05s ease;
}

/* Enemy v2 - slightly bigger (handled in JS), thicker stroke */
.enemy-shape.enemy-v2 {
  stroke-width: 1;
  fill: var(--accent-dim2);
}

/* Enemy v3 - bigger (handled in JS), filled with accent color */
.enemy-shape.enemy-v3 {
  fill: var(--accent);
  stroke-width: 2.2;
}

.enemy-hp-bar-bg {
  fill: var(--grid-line);
}

.enemy-hp-bar {
  fill: var(--accent);
  transition: width 0.1s ease;
}

.projectile {
  fill: var(--accent);
}

.projectile.arrow {
  fill: var(--text-primary);
}

.projectile.ice {
  fill: #66ccff;
}

.projectile.fire {
  fill: #ff6633;
}

.projectile.poison {
  fill: #66ff66;
}

/* Enemy Projectiles (Balista) */
.enemy-projectile-shape {
  fill: var(--error);
  stroke: var(--text-primary);
  stroke-width: 1;
}

/* Tower Destruction Effect */
.tower-destruction-particle {
  fill: var(--error);
}

.shockwave {
  fill: none;
  stroke: var(--text-primary);
  stroke-width: 1px;
  pointer-events: none;
}

/* Balista Enemy (Star) */
.enemy-shape.enemy-balista {
  stroke: var(--text-primary);
  stroke-width: 2;
  fill: var(--accent-dim2);
  transform-box: fill-box;
  transform-origin: center center;
  animation: balista-rotate 3s linear infinite;
}

@keyframes balista-rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Status Effects */
.enemy-shape.slowed {
  stroke: #66ccff;
}

.enemy-shape.burning {
  stroke: #ff6633;
}

.enemy-shape.poisoned {
  stroke: #66ff66;
}

/* Damage Numbers */
.damage-number {
  font-family: 'Source Code Pro', monospace;
  font-size: 12px;
  fill: var(--accent);
  pointer-events: none;
  text-anchor: middle;
}

.damage-number.damage-normal {
  fill: var(--text-primary);
}

.damage-number.damage-fire {
  fill: #ff6633;
}

.damage-number.damage-poison {
  fill: #66ff66;
}

.damage-number.damage-ice {
  fill: #66ccff;
}

/* Burn particles */
.burn-particle {
  fill: #ff6633;
  pointer-events: none;
}

/* Poison particles */
.poison-particle {
  fill: #66ff66;
  pointer-events: none;
}

/* Splash/explosion ring for fire tower */
.splash-ring {
  fill: none;
  stroke: #ff6633;
  stroke-width: 3;
  pointer-events: none;
}

/* ==========================================
   Modals
   ========================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  transition: opacity 0.3s ease;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--grid-line);
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  position: relative;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--grid-line);
  padding-bottom: 1rem;
}

.modal-header h2 {
  font-size: 1.5rem;
  letter-spacing: 2px;
  color: var(--accent);
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
}

.close-btn:hover {
  color: var(--text-primary);
}

.modal-body section {
  margin-bottom: 1.5rem;
}

.modal-body h3 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.modal-body p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.modal-body ul {
  list-style: none;
}

.modal-body li {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.modal-body li strong {
  color: var(--accent);
  margin-right: 0.5rem;
}

.modal-footer {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
}

.hud-icon-btn {
  background: transparent;
  border: 1px solid var(--grid-line);
  color: var(--text-secondary);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
  margin-right: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.hud-icon-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ==========================================
   Animations
   ========================================== */

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}

@keyframes float-up {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-20px); }
}

.entry-pulse, .exit-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 768px) {
  .game-title {
    font-size: 2.5rem;
  }

  #hud {
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
  }

  .hud-center {
    display: none;
  }

  #tower-panel {
    flex-wrap: wrap;
    height: auto;
    padding: 0.75rem;
    gap: 0.75rem;
  }

  .tower-btn {
    min-width: 60px;
    padding: 0.4rem 0.5rem;
  }

  .tower-icon {
    width: 18px;
    height: 18px;
  }

  .tower-name {
    font-size: 0.55rem;
  }

  .tower-cost {
    font-size: 0.5rem;
  }

  .panel-divider {
    display: none;
  }

  .action-btn {
    font-size: 0.65rem;
    padding: 0.5rem 1rem;
  }

  /* Mobile Tooltip positioning */
  #tower-tooltip {
    position: fixed !important;
    top: auto !important;
    bottom: 120px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: 90%;
    max-width: 400px;
    z-index: 2000;
  }
}